US 12,323,146 B2
Logic device using skyrmion
Kab-Jin Kim, Daejeon (KR); and Moojune Song, Daejeon (KR)
Assigned to KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed by Korea Advanced Institute of Science and Technology, Daejeon (KR)
Filed on Apr. 16, 2021, as Appl. No. 17/232,458.
Claims priority of application No. 10-2020-0060519 (KR), filed on May 20, 2020; and application No. 10-2021-0003849 (KR), filed on Jan. 12, 2021.
Prior Publication US 2021/0367602 A1, Nov. 25, 2021
Int. Cl. H03K 19/18 (2006.01); G06F 7/501 (2006.01)
CPC H03K 19/18 (2013.01) [G06F 7/501 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A logic device using an annihilation of skyrmion, which comprises an input part; an output part; and an operation part located between the input part and the output part and includes at least one notch, and
wherein the logic device comprises a nonmagnetic layer and a magnetic layer formed on the nonmagnetic layer, the skyrmion and the at least one notch are located on the magnetic layer,
wherein a current is applied to the nonmagnetic layer to cause spin at each position to rotate by a spin transfer torque or a spin orbit torque to moves the skyrmion from the input part to the output part,
wherein when only one skyrmion is input to the input part, the one skyrmion is preserved in the operation part and moves to the output part, and
when two skyrmions are input to the input part, the two skyrmions repell each other in the operation part, and thus one skyrmion is annihilated at the at least one notch and the other skyrmion moves to the output part.